Wrench.



PATENTED SEPT. 27, 1904.

R. F. PATMAN.

WRENCH.

APPLIOATION FILED DBO.26, 1903.

N0 MODEL,

Patented September 27, 1904.

PATENT RICHARD F. PATMAN, OF CALHOUN, GEORGIA.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 770,921, dated September 2'7, 1904.

Application filed December 26, 1903. Serial No. 186,733. (No model.)

To alt w/wm, it may concern.-

Be it known that I, RICHARD F. PATMAN, a citizen of the United States, residing at Calhoun, in the county of Gordon and State of Georgia, have invented a new and useful Wrench, of which the following is a specification.

This invention relates to wrenches, and has for its object to improve, simplify,and cheapen the construction of devices of this character and to provide a durable and efficient wrench capable of rapid and accurate adjustment.

A further object of the invention is to provide means for insuring the positive engagement of the pivoted locking members with the shank of the wrench.

A still further object is to provide a pair of slidable toothed blocks, actuated by a common operating lever and adapted to engage the opposite sides of the shank when said lever isdepressed and securely clamp the movable jaw in the adjusted position.

'The invention consists in the construction and novel combination and arrangement of parts hereinafter fully described, illustrated in the accompanying drawings, and pointed out in the claims hereto appended, it being understood that various changes in form, proportion, and minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of this invention.

In the accompanying drawings, forming a part of this specification, Figure 1 is a perspective view of a wrench constructed in accordance with my invention, showing the lever depressed and the movable jaw locked in the adjusted position. Fig. 2 is a vertical sectional view showing the locking members withdrawn from engagement with the teeth on the shank. Fig. 3 is a transverse sectional View. Fig. 4 is a detail perspective of one of the pivoted locking members detached.

Similar numerals of reference indicate corresponding parts in all the figures of the drawings.

The wrench, which may beformed of metal or other suitable material, comprises a fixed jaw 5, provided with a depending shank 6, the lower end of which is threaded for the reception of a terminal handle 7. The opposite side edges of the shank 6 are provided with rows of teeth 8, and slidably mounted on said shank is the movable jaw 9, having the usual longitudinal opening 10, formed therein and adapted to receive the same. The movable jaw 9 is provided with oppositely-disposed rectangular openings 11, which extend through the walls of the jaws and communicate with the opening 10,,as shown. Slidably mounted in the openings 11 is a pair of locking members or blocks 12, the inner face of each of which is provided with tapering teeth 13, arranged to coincide and engage the teeth on the shank 6. The blocks 12 are pivoted in any suitable manner, as by a pin or rod 14, to an operating-lever 15, one endof which is extended to form a handle 16, the opposite end thereof being pivoted between upwardly-extending ears or lugs 17, preferably formed integral with the movablejaw 9. The openings in the movable jaw are so disposed that when the operating-handle 16 is depressed the teeth 13 mesh with the teeth on the shank 6,while the smooth outer faces 18 of said blocks engage the inner side walls 19 of the movable jaw, thereby serving to guide the blocks and prevent lateral displacement of the same. The toothed blocks are formed with shoulders 19, adapted to engage the face of the movable jaw and limit the downward movement of said blocks, as will be readily understood. In order to take up any lost motion incident to wear on the pin or toothed blocks, I provide washers 20, mounted on the pin 14 and interposed between the operating-lever and said blocks.

In operation when it is desired to adjust the wrench the handle 16 is elevated, which disengages the locking members or blocks 12 from the teeth on the shankfthereby permitting the movable jaw to be adjusted longitudinally on said shank. When the movable jaw has been adjusted to accommodate the particular size nut to be removed, said jaw may be securely clamped in the adjusted position by depressing the lever, which causes the teeth on the shank and locking-blocks to inter-mesh, as will be readily understood.

The locking members may be arranged on either side of the movable jaw, and, if desired, but a single key or looking member may be employed for clamping the movable jaw in adjusted position.

While I have shown and described the teeth as being preferably formed on the opposite edges of the shank, it is obvious that the same may be arranged on the upper and lower faces thereof and the guide-openings formed in the back of the movable jaw for the reception of the locking members.

Having thus described the invention, what is claimed is 1. In a wrench, a fixed jaw provided with a shank, a movable jaw, an operating-lever, and a pair of locking members pivoted to the lever and adapted to engage the opposite sides of the shank.

2. In a wrench, a fixed jaw provided with a shank, a movable jaw, an operating-lever, and a pair of locking members slidably mounted in the movable jaw and pivoted to the operating-lever, said locking member being adapted to engage the opposite sides of the shank.

3. In a wrench, a fixed jaw provided with a shank, amovable jaw, an operating-lever, and a pair of toothed blocks pivoted to the lever and adapted to engage the opposite sides of the shank.

, 4. In a wrench, a fixed jaw having a shank provided with oppositely-disposed teeth, a movable jaw, a pair of toothed blocks adapted to engage the teeth on the shank and a common operating-lever for both of said blocks.

5. In a wrench, a fixed jaw having a shank provided with oppositely -disposed teeth, a movable jaw having guiding-openings formed therein communicating with the shank, a pair of toothed blocks slidably mounted in said openings and adapted to engage the teeth on the shank, stops carried by the blocks, and a common operatinglever for reciprocating both of said blocks.

6. In a wrench, a fixed jaw having a shank provided with oppositely-disposed teeth, a movable jaw having guiding-openings formed therein communicating with the shank, a pair of blocks slidably mounted in said openings, tapering teeth formed on the inner faces of the blocks and adapted to engage the teeth on the shank, and an operating-lever pivoted to the movable jaw for reciprocating said blocks.

7 In a wrench, a fixed jaw having a shank provided with oppositely-disposed teeth, a movable jaw having guiding-openings formed therein communicating with the shank, a pair of toothed blocks slidably mounted in said openings and adapted to engage the teeth on the shank and the inner walls of the movable jaw, and anoperating-lever pivoted to the movable jaw for reciprocating said blocks.

8. In a wrench, a fixed jaw having a shank provided with oppositely-disposed teeth, a movable jaw provided'with projecting ears or lugs and having guiding-openings formed in one of its side faces and communicating with the shank, a pair of toothed blocks slidably mounted in said openings, an operating-lever having one end thereof pivoted between the ears or lugs, a pivotal connection between the opposite end of the lever and the toothed blocks, and washers interposed between said lever and toothed blocks.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two Witnesses.

RICHARD F. PATMAN.

Witnesses:

W. P. DODD, J. C. HUFSTETLER. 

